articleJournal of the American Chemical SocietySep 8, 2025Closed access

Oxophilic Sites Mediated Dynamic Oxygen Replenishment to Stabilize Lattice Oxygen Catalysis in Acidic Water Oxidation

Nanjing University of Aeronautics and Astronautics · National Yang Ming Chiao Tung University · +5 more institutions

PubMed
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Abstract

Developing efficient and durable catalysts for the oxygen evolution reaction (OER) in acidic media is essential for advancing proton exchange membrane water electrolysis (PEMWE). However, catalyst instability caused by lattice oxygen (OL) depletion and metal dissolution remains a critical barrier. Here, we propose an oxophilic-site-mediated dynamic oxygen replenishment mechanism (DORM), in which OL actively participates in O–O bond formation and is continuously refilled by water-derived species. Oxophilic dopants modulate the local electronic structure, lower the energy barrier for oxygen vacancy healing, and reorganize the interfacial hydrogen-bond network to enhance water mobility, orientation, and proton…

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